Question

Equações de 2° grau


a) 5x² -X=0




b) X ² -100=0




c) 12X ² +2X=0



me ajudem porfavor estou com dificuldades nessas 3 obrg.

Answer 1

a)
X × (5X-1) = 0

X=0

5x1=0
X=0

X=
$\frac{1}{5}$
X1 =0 , x2 =
$\frac{1}{5}$

Answer 2

a) 5x² -X=0

5x • (x - 1) = 0

x= 0

5x - 1 = 0

5x = 0 + 1

5x = 1

x= 1/5

S= ( 0 , 1/5)

b) X ² -100=0

x²= 0 + 100

x² = 100

x= ± √100

x= ± 10

S= ( 10 , - 10)

c) 12X ² +2X=0

2x • (6x + 1) = 0

x= 0

12x + 2 = 0

12x = 0 - 2

12x = - 2

x= - 2/12

S= (0 , - 2/12)